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Property, Plant and Equipment
 12 Months Ended
Dec. 31, 2020
Property, Plant and Equipment [Abstract]  
Property, Plant and Equipment Property, Plant and Equipment
The following table summarizes the components of property, plant and equipment:
  December 31,
ClassificationEstimated Useful Life20202019
Land and buildings
20-35 years
$346.5 $323.0 
Machinery and equipment
3-12 years
214.4 198.6 
Computer equipment, furniture and fixtures
3-7 years
40.8 45.5 
Right-of-use assets44.4 42.3 
Construction in process18.2 21.0 
Total property, plant and equipment, gross664.3 630.4 
Less: accumulated depreciation(249.8)(232.6)
Total property, plant and equipment, net$414.5 $397.8 
Depreciation expense was $38.8, $37.9 and $27.8 for the years ended December 31, 2020, 2019 and 2018, respectively.